// Momentary switch latching
// https://forum.arduino.cc/t/momentary-switch-latching/1419213

const int button1Pin = A5; // Pin where the momentary switch is connected
const int button2Pin = A3; // Pin where the momentary switch is connected
const int led1Pin = 9; // Pin where the ouput is connected
const int led2Pin = 10; // Pin where the ouput is connected

int button1State = 0; // Variable for reading the button status
int lastButton1State = 0; // Variable for storing the last button state
int led1State = LOW; // Variable for storing the LED state

int button2State = 0; // Variable for reading the button status
int lastButton2State = 0; // Variable for storing the last button state
int led2State = LOW; // Variable for storing the LED state

void setup() {
  pinMode(button1Pin, INPUT_PULLUP);
  pinMode(button2Pin, INPUT_PULLUP);
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);

  // initialise variables
  lastButton1State = digitalRead(button1Pin);
  lastButton2State = digitalRead(button2Pin);
}

void loop() {
  button1State = digitalRead(button1Pin);
  if (button1State != lastButton1State) {
    lastButton1State = button1State;
    if (button1State == HIGH) {
      led1State = !led1State;
      digitalWrite(led1Pin, led1State);
    }
    delay(50); // Debounce delay
  }

  button2State = digitalRead(button2Pin);
  if (button2State != lastButton2State) {
    lastButton2State = button2State;
    if (button2State == HIGH) {
      led2State = !led2State;
      digitalWrite(led2Pin, led2State);
    }
    delay(50); // Debounce delay
  }
}